[PATCH v2 0/4] ARC: [plat-hsdk-4xd] initial port for HSDK-4xD board

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Changes v1->v2:
 * Fallback to ISA default mcpu flag if custom one isn't supported by
 * Drop HSDK custom Kconfig options (choose between HSDK and HSDK-4xD) as
   we don't need it (at least for now). Instead we select ARC_LPB_DISABLE
   for both boards but it's totally OK as HSDK doesn't have LPB so
   disabling will be skipped by BCR check in runtime.
 * Add missing HSDK-4xD device tree bindings. Convert HSDK device tree
   bindings to json-schema.

Eugeniy Paltsev (4):
  ARC: allow to override default mcpu compiler flag
  ARC: ARCv2: support loop buffer (LPB) disabling
  ARC: [plat-hsdk-4xd] initial port for HSDK-4xD board
  ARC: [plat-hsdk*] document HSDK-4xD board/SoC bindings

 .../devicetree/bindings/arc/hsdk.txt          |   7 -
 .../devicetree/bindings/arc/hsdk.yaml         |  26 ++
 arch/arc/Kconfig                              |  15 +
 arch/arc/Makefile                             |  21 +-
 arch/arc/boot/dts/hsdk-4xd.dts                | 322 ++++++++++++++++++
 arch/arc/configs/hsdk_4xd_defconfig           |  98 ++++++
 arch/arc/kernel/devtree.c                     |   1 +
 arch/arc/kernel/head.S                        |   8 +
 arch/arc/plat-hsdk/Kconfig                    |   3 +-
 arch/arc/plat-hsdk/platform.c                 |   1 +
 10 files changed, 492 insertions(+), 10 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arc/hsdk.txt
 create mode 100644 Documentation/devicetree/bindings/arc/hsdk.yaml
 create mode 100644 arch/arc/boot/dts/hsdk-4xd.dts
 create mode 100644 arch/arc/configs/hsdk_4xd_defconfig


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